Tianjin Key Laboratory of Pulp & Paper, School of light industry science and engineering, Tianjin University of Science & Technology, Tianjin 300457, China; State Key Laboratory of Food Nutrition and Safety, College of Food Science and Technology, Tianjin University of Science & Technology, Tianjin 300457, China.
Tianjin Key Laboratory of Pulp & Paper, School of light industry science and engineering, Tianjin University of Science & Technology, Tianjin 300457, China; Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, School of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China.
Int J Biol Macromol. 2022 Dec 1;222(Pt A):395-402. doi: 10.1016/j.ijbiomac.2022.09.139. Epub 2022 Sep 19.
Hemicellulose and its derivatives have attracted extensive attention as packaging materials and various methods have been utilized to improve its film formation properties. To make use of the byproduct in dissolving pulp production, hemicellulose collected from waste water was modified by carboxymethylation and blended with polyvinyl alcohol (PVA) to prepare composite film by solution casting method. Potassium cinnamate (PC) was further incorporated to endow the film with antibacterial activity. The properties of the composite films were characterized. Due to the good compatibility and intermolecular interactions, the composite film exhibited moderate oxygen barrier property (3.64-12.21 cm μm m d KPa). The flexibility of the film was improved compared with pure PVA film although tensile strength was decreased. The film had good UV barrier properties and good antibacterial properties due to the introduction of PC. GAB model could be used to predict moisture sorption of the composite films. Moreover, the obtained film showed good performance in cherry tomato preservation. This work provided a prospective route for utilization of hemicellulose recovered from waste water for high value-added products.
半纤维素及其衍生物作为包装材料受到广泛关注，各种方法被用于改善其成膜性能。为了利用溶解浆生产中的副产物，对从废水中收集的半纤维素进行羧甲基化改性，并与聚乙烯醇（PVA）共混，通过溶液浇铸法制备复合膜。进一步加入肉桂酸钾（PC）赋予薄膜抗菌活性。对复合膜的性能进行了表征。由于良好的相容性和分子间相互作用，复合膜表现出适度的氧气阻隔性能（3.64-12.21cmμmmdKPa）。与纯 PVA 膜相比，尽管拉伸强度降低，但膜的柔韧性得到提高。由于 PC 的引入，该膜具有良好的紫外阻隔性能和良好的抗菌性能。GAB 模型可用于预测复合膜的吸湿性能。此外，所得薄膜在樱桃番茄保鲜方面表现出良好的性能。这项工作为利用废水中回收的半纤维素生产高附加值产品提供了有前景的途径。
